| 제목 | Tenda A21 V1.0.0.0 Stack-based Buffer Overflow |
|---|
| 설명 | During a security review of the Tenda A21 router firmware (version V1.0.0.0), a critical stack-based buffer overflow vulnerability was identified in the Wi-Fi configuration endpoint /goform/fast_setting_wifi_set.
The vulnerability exists within the form_fast_setting_wifi_set function. This function retrieves the user-controlled parameter ssid via the websGetVar interface and processes it into a fixed-size stack buffer ssid_5g (64 bytes). Due to the use of the unsafe sprintf function without length validation, an attacker can provide an overly long SSID to overwrite the stack, leading to a Denial of Service (DoS) or arbitrary code execution with root privileges. |
|---|
| 원천 | ⚠️ https://github.com/QIU-DIE/cve-nneeww/issues/5 |
|---|
| 사용자 | hhsw34 (UID 91076) |
|---|
| 제출 | 2026. 02. 09. PM 12:46 (8 개월 ago) |
|---|
| 모더레이션 | 2026. 02. 20. PM 03:41 (11 days later) |
|---|
| 상태 | 수락 |
|---|
| VulDB 항목 | 347111 [Tenda A21 1.0.0.0 fast_setting_wifi_set form_fast_setting_wifi_set ssid 메모리 손상] |
|---|
| 포인트들 | 20 |
|---|